Re-enable test.

The boot image can now be compiled with optimizing.

Change-Id: Idbdec44ccb01e3b0251914da150d9dd0854c61e6
diff --git a/compiler/elf_writer_test.cc b/compiler/elf_writer_test.cc
index fd3a912..8e2d175 100644
--- a/compiler/elf_writer_test.cc
+++ b/compiler/elf_writer_test.cc
@@ -46,11 +46,7 @@
     EXPECT_EQ(expected_value, ef->FindDynamicSymbolAddress(symbol_name)); \
   } while (false)
 
-#if defined(ART_USE_OPTIMIZING_COMPILER)
-TEST_F(ElfWriterTest, DISABLED_dlsym) {
-#else
 TEST_F(ElfWriterTest, dlsym) {
-#endif
   std::string elf_location = GetCoreOatLocation();
   std::string elf_filename = GetSystemImageFilename(elf_location.c_str(), kRuntimeISA);
   LOG(INFO) << "elf_filename=" << elf_filename;